diff options
| -rw-r--r-- | drivers/infiniband/core/cm.c | 89 |
1 files changed, 66 insertions, 23 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index c0150147d34..638b727d42e 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -974,6 +974,9 @@ static void cm_format_req(struct cm_req_msg *req_msg, struct cm_id_private *cm_id_priv, struct ib_cm_req_param *param) { + struct ib_sa_path_rec *pri_path = param->primary_path; + struct ib_sa_path_rec *alt_path = param->alternate_path; + cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); @@ -997,35 +1000,46 @@ static void cm_format_req(struct cm_req_msg *req_msg, cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); cm_req_set_srq(req_msg, param->srq); - req_msg->primary_local_lid = param->primary_path->slid; - req_msg->primary_remote_lid = param->primary_path->dlid; - req_msg->primary_local_gid = param->primary_path->sgid; - req_msg->primary_remote_gid = param->primary_path->dgid; - cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); - cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); - req_msg->primary_traffic_class = param->primary_path->traffic_class; - req_msg->primary_hop_limit = param->primary_path->hop_limit; - cm_req_set_primary_sl(req_msg, param->primary_path->sl); - cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ + if (pri_path->hop_limit <= 1) { + req_msg->primary_local_lid = pri_path->slid; + req_msg->primary_remote_lid = pri_path->dlid; + } else { + /* Work-around until there's a way to obtain remote LID info */ + req_msg->primary_local_lid = IB_LID_PERMISSIVE; + req_msg->primary_remote_lid = IB_LID_PERMISSIVE; + } + req_msg->primary_local_gid = pri_path->sgid; + req_msg->primary_remote_gid = pri_path->dgid; + cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); + cm_req_set_primary_packet_rate(req_msg, pri_path->rate); + req_msg->primary_traffic_class = pri_path->traffic_class; + req_msg->primary_hop_limit = pri_path->hop_limit; + cm_req_set_primary_sl(req_msg, pri_path->sl); + cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); cm_req_set_primary_local_ack_timeout(req_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, - param->primary_path->packet_life_time)); + pri_path->packet_life_time)); - if (param->alternate_path) { - req_msg->alt_local_lid = param->alternate_path->slid; - req_msg->alt_remote_lid = param->alternate_path->dlid; - req_msg->alt_local_gid = param->alternate_path->sgid; - req_msg->alt_remote_gid = param->alternate_path->dgid; + if (alt_path) { + if (alt_path->hop_limit <= 1) { + req_msg->alt_local_lid = alt_path->slid; + req_msg->alt_remote_lid = alt_path->dlid; + } else { + req_msg->alt_local_lid = IB_LID_PERMISSIVE; + req_msg->alt_remote_lid = IB_LID_PERMISSIVE; + } + req_msg->alt_local_gid = alt_path->sgid; + req_msg->alt_remote_gid = alt_path->dgid; cm_req_set_alt_flow_label(req_msg, - param->alternate_path->flow_label); - cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); - req_msg->alt_traffic_class = param->alternate_path->traffic_class; - req_msg->alt_hop_limit = param->alternate_path->hop_limit; - cm_req_set_alt_sl(req_msg, param->alternate_path->sl); - cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ + alt_path->flow_label); + cm_req_set_alt_packet_rate(req_msg, alt_path->rate); + req_msg->alt_traffic_class = alt_path->traffic_class; + req_msg->alt_hop_limit = alt_path->hop_limit; + cm_req_set_alt_sl(req_msg, alt_path->sl); + cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); cm_req_set_alt_local_ack_timeout(req_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, - param->alternate_path->packet_life_time)); + alt_path->packet_life_time)); } if (param->private_data && param->private_data_len) @@ -1441,6 +1455,34 @@ out: return listen_cm_id_priv; } +/* + * Work-around for inter-subnet connections. If the LIDs are permissive, + * we need to override the LID/SL data in the REQ with the LID information + * in the work completion. + */ +static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) +{ + if (!cm_req_get_primary_subnet_local(req_msg)) { + if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { + req_msg->primary_local_lid = cpu_to_be16(wc->slid); + cm_req_set_primary_sl(req_msg, wc->sl); + } + + if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) + req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); + } + + if (!cm_req_get_alt_subnet_local(req_msg)) { + if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { + req_msg->alt_local_lid = cpu_to_be16(wc->slid); + cm_req_set_alt_sl(req_msg, wc->sl); + } + + if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) + req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); + } +} + static int cm_req_handler(struct cm_work *work) { struct ib_cm_id *cm_id; @@ -1481,6 +1523,7 @@ static int cm_req_handler(struct cm_work *work) cm_id_priv->id.service_id = req_msg->service_id; cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); + cm_process_routed_req(req_msg, work->mad_recv_wc->wc); cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); if (ret) { |